A former zoo turned public park, where visitors can hang out in the old animal cages.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

This ancient market is often referred to as the oldest shopping mall in the world.

This mountain trail inspired Nietzsche to complete his magnum opus.

This replica of the Greek structure is in the heart of Nashville.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The magic's in the hole!

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

The world-record holder for the longest bridge stretching continuously over water.

Nature's biggest mammal swims in landlocked Oklahoma.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

A fiery crater has been burning in the Karakum Desert since 1971.

Frozen in Norway, vended in Singapore.